CVE-2012-5507
AccessControl/AuthEncoding.py in Zope before 2.13.19, as used in Plone before 4.2.3 and 4.3 before beta 1, allows remote attackers to obtain passwords via vectors involving timing discrepancies in password validation.
Date published : 2014-09-30
https://bugs.launchpad.net/zope2/+bug/1071067
https://github.com/plone/Products.CMFPlone/blob/4.2.3/docs/CHANGES.txt